A Lincoln police officer has resigned after an investigation into an incident in which he is accused of providing alcohol to his 19-year-old girlfriend.

Investigators with the Lancaster County Sheriff’s Office cited Scott Bierle on suspicion of procuring alcohol for a minor and cited the 19-year-old on suspicion of minor in possession of alcohol. After the citations were issued, Lincoln Police Chief Jeff Bliemeister began an internal investigation, Lincoln police said Friday.